Display module, parameter determination method of display module and display device

Abstract

The application discloses a display module, a parameter determination method of the display module and a display device. The display module comprises a display area and a non-display area surrounding the display area at least partially, and further comprises a display panel, a light shielding layer and a cover plate. The display panel comprises a substrate and a light emitting layer, and the light emitting layer comprises a light emitting functional part located in the display area. The light shielding layer is located on a light emitting surface side of the display panel and in the non-display area. The cover plate is located on a side of the light shielding layer away from the display panel. In a direction parallel to the substrate, the minimum distance between the light emitting functional part and the light shielding layer is a first minimum distance. In a direction perpendicular to the substrate, the minimum distance between a surface of the light emitting functional part away from the substrate and a surface of the light shielding layer close to the substrate is a second minimum distance. The size of the first minimum distance and / or the second minimum distance is set to enable light emitted by the light emitting functional part to be emitted from a light emitting surface of the cover plate or to be absorbed by the light shielding layer after being reflected by the cover plate. The display module provided by the application can improve the edge light leakage phenomenon.

Description

Technical Field

[0001] This application belongs to the field of display technology, and in particular relates to a display module, a method for determining the parameters of the display module, and a display device. Background Technology

[0002] With the development of display technology, the performance requirements for display devices are becoming increasingly demanding, while users' requirements for product appearance quality are also rising. Existing display devices suffer from edge light leakage, which severely impacts the user experience. Summary of the Invention

[0003] This application provides a display module, a method for determining the parameters of the display module, and a display device to improve the edge light leakage phenomenon of the display module.

[0004] An embodiment of the first aspect of this application provides a display module, the display module including a display area and a non-display area at least partially surrounding the display area, the display module further including:

[0005] The display panel includes a substrate and a light-emitting layer formed on the substrate, the light-emitting layer including a light-emitting functional portion located in the display area;

[0006] A light-shielding layer is located on the light-emitting side of the display panel, and the light-shielding layer is located in the non-display area;

[0007] The cover plate is located on the side of the light-shielding layer opposite to the display panel;

[0008] Wherein, the minimum distance between the light-emitting functional part and the light-shielding layer along the direction parallel to the substrate is the first minimum distance; the minimum distance between the surface of the light-emitting functional part away from the substrate and the surface of the light-shielding layer close to the substrate along the direction perpendicular to the substrate is the second minimum distance;

[0009] The dimensions of the first minimum distance and / or the second minimum distance are set such that the light emitted by the light-emitting functional part is emitted from the light-emitting surface of the cover plate, or is absorbed by the light-shielding layer after being reflected by the cover plate.

[0010] According to the foregoing embodiment of the first aspect of the present invention, the first minimum distance is greater than 0.2 mm;

[0011] Preferably, the second minimum distance is greater than 1.15 mm.

[0012] Preferably, the light-emitting functional part includes a first electrode layer and a light-emitting material layer stacked along the direction away from the substrate, and the display panel further includes an encapsulation part, the encapsulation part is located on the side of the first electrode layer away from the substrate and is located on the same layer as the light-emitting material layer, the encapsulation part is located on the side of the light-emitting material layer near the non-display area, and the encapsulation part is in contact with the edge of the light-emitting material layer near the non-display area;

[0013] Along the direction from the display area to the non-display area, the minimum distance between the edge of the encapsulation portion closer to the display area and the edge of the encapsulation portion farther from the display area is greater than 0.4 mm and less than 0.7 mm.

[0014] According to any of the foregoing embodiments of the first aspect of the present invention, the display module further includes an outer frame, which is disposed on the periphery of the display panel and spaced apart from the display panel by a third minimum distance; the third minimum distance is greater than 0.2 mm.

[0015] According to any of the foregoing embodiments of the first aspect of the present invention, the display module further includes a touch bonding adhesive layer, a touch sensing layer, a transparent adhesive layer, a polarizing layer and a cover adhesive layer disposed sequentially between the display panel and the cover plate and in a direction away from the display panel;

[0016] Preferably, the thickness of the touch-sensitive adhesive layer is greater than or equal to 0.1 mm and less than or equal to 0.15 mm;

[0017] Preferably, the total thickness of the transparent adhesive layer and the polarizing layer along the first direction is greater than 0.15 mm and less than or equal to 0.17 mm;

[0018] Preferably, the thickness of the cover plate adhesive layer along the first direction is greater than 0.15 mm and less than or equal to 0.25 mm.

[0019] An embodiment of the second aspect of this application provides a method for determining parameters of a display module. The display module includes a display panel, a light-shielding layer, and a cover plate arranged sequentially along a first direction. The display panel includes a substrate and a light-emitting layer formed on the substrate. The display module further includes a display area and a non-display area at least partially surrounding the display area. The light-shielding layer is located in the non-display area, and the light-emitting layer includes a light-emitting functional part located in the display area.

[0020] Along a direction parallel to the substrate, the minimum distance between the light-emitting functional part and the light-shielding layer is the first minimum distance; along a direction perpendicular to the substrate, the minimum distance between the surface of the light-emitting functional part away from the substrate and the surface of the light-shielding layer close to the substrate is the second minimum distance.

[0021] The parameter determination method includes:

[0022] Adjust at least one of the first minimum distance and the second minimum distance so that the light emitted by the light-emitting functional part is emitted from the light-emitting surface of the cover plate or absorbed by the light-shielding layer after being reflected by the cover plate.

[0023] According to the foregoing embodiment of the second aspect of the present invention, the step of adjusting at least one of the first minimum distance and the second minimum distance so that the light emitted by the light-emitting functional part is emitted from the light-emitting surface of the display panel or absorbed by the light-shielding layer after being reflected by the cover plate includes:

[0024] Adjust the first minimum distance to make it greater than a first preset value; or,

[0025] Adjust the second minimum distance to make the second minimum distance greater than the second preset value;

[0026] Preferably, the first preset value is 0.2 mm; the second preset value is 1.15 mm.

[0027] According to any of the foregoing embodiments of the second aspect of the present invention, the light-emitting functional part includes a first electrode layer and a light-emitting material layer stacked along a direction away from the substrate, and the display panel further includes an encapsulation part, the encapsulation part being located on the side of the first electrode layer away from the substrate and on the same layer as the light-emitting material layer, the encapsulation part being located on the side of the light-emitting material layer near the non-display area, and the encapsulation part contacting the edge of the light-emitting material layer near the non-display area;

[0028] The minimum distance between the edge of the encapsulation portion near the display area and the edge of the encapsulation portion away from the display area along the direction from the display area is the first distance d1;

[0029] The step of adjusting the first minimum distance to make the first minimum distance greater than the first preset value includes:

[0030] Increase the first distance d1;

[0031] Preferably, 0.4mm <d1<0.7mm;

[0032] According to any of the foregoing embodiments of the first aspect of the present invention, the display module further includes an outer frame disposed on the periphery of the display panel and spaced apart from the display panel by a third minimum distance; along the direction from the display area to the non-display area, the minimum distance between the edge of the outer frame close to the display area and the edge of the outer frame away from the display area is the second distance d2; the step of adjusting the first minimum distance so that the first minimum distance is greater than a first preset value includes:

[0033] Keeping the third minimum distance and the size of the light-shielding layer unchanged, and increasing the second distance d2;

[0034] Preferably, the third minimum distance is greater than 0.2 mm.

[0035] According to any of the foregoing embodiments of the second aspect of the present invention, the display module further includes a transparent adhesive layer, a polarizing layer, and a cover plate adhesive layer that are disposed between the display panel and the cover plate and are sequentially disposed in a direction away from the display panel;

[0036] The step of adjusting the second minimum distance so that the second minimum distance is greater than a second preset value includes:

[0037] The total thickness of the transparent adhesive layer and the polarizing layer in the first direction is the third distance d3, and the third distance d3 is adjusted such that 0.15 mm < d3 ≤ 0.17 mm; and / or,

[0038] The thickness of the cover plate adhesive layer in the first direction is the fourth distance d4, and the fourth distance d4 is adjusted such that 0.15 mm < d4 ≤ 0.25 mm; and / or,

[0039] The display module further includes a touch sensing layer located between the display panel and the transparent adhesive layer, and the step of adjusting the size of the second minimum distance so that the second minimum distance is greater than a second preset value includes:

[0040] A touch bonding adhesive layer is provided between the display panel and the touch sensing layer;

[0041] Preferably, the thickness of the touch bonding adhesive layer in the first direction is the fifth distance d5, and the fifth distance d5 is adjusted such that 0.1 mm ≤ d5 ≤ 0.15 mm.

[0042] An embodiment of the third aspect of the embodiments of the present application provides a display device including any of the display modules provided in the second aspect of the present application.

[0043] The present application also provides a display module, such as Figures 1 to 4As shown, the display module includes a display area and a non-display area at least partially surrounding the display area. The display module includes a display panel, a light-shielding layer, and a cover plate. The display panel includes a substrate and a light-emitting layer formed on the substrate. The light-emitting layer includes light-emitting functional parts located in the display area. The light-shielding layer is located on the light-emitting surface side of the display panel and is located in the non-display area. The cover plate is located on the side of the light-shielding layer opposite to the display panel. The minimum distance between the light-emitting functional parts and the light-shielding layer along a direction parallel to the substrate is a first minimum distance; the minimum distance between the surface of the light-emitting functional parts opposite to the substrate and the surface of the light-shielding layer near the substrate along a direction perpendicular to the substrate is a second minimum distance; the dimensions of the first minimum distance and / or the second minimum distance are set such that light emitted by the light-emitting functional parts is emitted from the light-emitting surface of the cover plate or absorbed by the light-shielding layer after reflection by the cover plate. This display module allows for setting the relative position of the light-shielding layer by defining a first minimum distance and / or a second minimum distance. This enables the light-shielding layer to better block large-angle light emitted by the light-emitting functional units in the light-emitting layer, while ensuring that unblocked light is emitted from the light-emitting surface of the cover plate or absorbed by the light-shielding layer after reflection by the cover plate. This reduces the probability of light emitted by the light-emitting functional units escaping directly through the cover plate, thereby improving light leakage at the edges of the display module and enhancing its display quality. Attached Figure Description

[0044] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of the structure of a display module in a method for determining the parameters of a display module provided in an embodiment of this application;

[0046] Figure 2 yes Figure 1 A cross-sectional view along P-P';

[0047] Figure 3 yes Figure 1 Another sectional view along P-P';

[0048] Figure 4 yes Figure 1 Another sectional view along P-P'.

[0049] In the attached image:

[0050] 1-Display module; 10-Display panel; 101-Substrate; 102-Emitting layer; 1021-Emitting functional part; 103-Encapsulation part; 104-Encapsulation layer; 11-Light shielding layer; 12-Cover plate; 13-Outer frame; 14-Touch sensing layer; 15-Transparent adhesive layer; 16-Polarizing layer; 17-Cover plate bonding adhesive layer; 18-Touch bonding adhesive layer; 19-Buffer support layer; 20-Adhesive layer; AA-Display area; NA-Non-display area. Detailed Implementation

[0051] The features and exemplary embodiments of various aspects of this application will now be described in detail. Numerous specific details are set forth in the following detailed description in order to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this application by illustrating examples thereof.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0053] The inventors discovered through research that the reason for light leakage at the edge of the display device is that when the display area is working, it emits light in all directions. Due to the total internal reflection of the cover plate surface, the emitted light eventually exits from the side of the cover plate edge. In particular, when it reaches the straight side of the cover plate edge, it continues to exit through the straight side of the cover plate, which is accompanied by lateral light leakage during display. When observing the display screen, it is easy to cause visual discomfort and affect the aesthetics of the product.

[0054] In related technologies, one approach is to apply a coating to the light-leaking area of ​​the cover plate to block light leakage. However, due to the small coating area and high precision requirements, existing processes are difficult to implement. Furthermore, the coating location is close to the edge of the display device, making it prone to wear during use and difficult to maintain a long-term light-blocking effect. Another approach is to use the outer frame of the display device to cover the light-leaking area of ​​the cover plate. However, to achieve a good fit between the cover plate and the outer frame, irregular cutting is required on the bottom edge of the cover plate, which presents problems of high manufacturing difficulty and high production cost. As can be seen, the related technologies are not very effective in improving the problem of light leakage at the edges of display devices.

[0055] Therefore, this application provides a display module, a method for determining the parameters of the display module, and a display device to better improve the edge light leakage phenomenon of the display module.

[0056] To better understand this application, the following will be combined with... Figures 1 to 4 The parameter determination method of the display panel and the display module according to the embodiments of this application will be described in detail.

[0057] This application also provides a display module 1, such as Figures 1 to 4 As shown, the display module 1 includes a display area AA and a non-display area NA that at least partially surrounds the display area AA. The display module 1 includes a display panel 10, a light-shielding layer 11, and a cover plate 12. The display panel 10 includes a substrate 101 and a light-emitting layer 10 formed on the substrate 101. The light-emitting layer 102 includes a light-emitting functional portion 1021 located in the display area AA. The light-shielding layer 11 is located on the light-emitting surface side of the display panel 10 and is located in the non-display area NA. The cover plate 12 is located on the side of the light-shielding layer 11 that faces away from the display panel 10. Wherein, along the direction parallel to the substrate 101, the minimum distance between the light-emitting functional part 1021 and the light-shielding layer 11 is the first minimum distance D; along the direction perpendicular to the substrate 101, the minimum distance between the surface of the light-emitting functional part 1021 away from the substrate 101 and the surface of the light-shielding layer 11 close to the substrate 101 is the second minimum distance H; the dimensions of the first minimum distance D and / or the second minimum distance H are set such that the light emitted by the light-emitting functional part 1021 is emitted from the light-emitting surface of the cover plate, or is absorbed by the light-shielding layer after being reflected by the cover plate.

[0058] The display module 1 can set the relative position of the light-shielding layer 11 by setting the size of the first minimum distance D and / or the second minimum distance H. This allows the light-shielding layer 11 to better block the large-angle light emitted by the light-emitting functional unit 1021 in the light-emitting layer 102, and ensures that the light not blocked by the light-shielding layer 11 is emitted from the light-emitting surface of the cover plate 12, or absorbed by the light-shielding layer 11 after being reflected by the cover plate 12. This reduces the probability of the light emitted by the light-emitting functional unit 1021 being emitted directly through the cover plate 12, thereby improving the light leakage phenomenon at the edge of the display module 1 and enhancing the display quality of the display module.

[0059] In one feasible implementation, the first minimum distance D is greater than 0.2 mm; the second minimum distance H is greater than 1.15 mm. Specifically, D can be 0.21 mm, 0.22 mm, 0.25 mm, 0.3 mm, etc., and this application does not impose any particular limitation. H can be 1.152 mm, 1.155 mm, 1.159 mm, 1.160 mm, etc., and this application does not impose any particular limitation.

[0060] In one feasible implementation, such as Figure 2 As shown, the light-emitting functional unit 1021 includes a first electrode layer and a light-emitting material layer stacked along the direction away from the substrate 101. The display panel 10 also includes an encapsulation unit 103. The encapsulation unit 103 is located on the side of the first electrode layer away from the substrate 101 and is located on the same layer as the light-emitting material layer. The encapsulation unit 103 is located on the side of the light-emitting material layer near the non-display area NA, and the encapsulation unit 103 is in contact with the edge of the light-emitting material layer near the non-display area NA.

[0061] In the above embodiments, the light-emitting functional unit 1021 further includes a second electrode layer located on the side of the light-emitting material layer away from the first electrode layer. The second electrode layer may be a cathode and the first electrode may be an anode. This application does not make any special limitation on this.

[0062] In the above embodiment, the minimum distance d1 between the edge of the encapsulation part 103 near the display area AA and the edge of the encapsulation part 103 away from the display area AA along the direction from the display area AA to the non-display area NA is greater than 0.4 mm and less than 0.7 mm. Specifically, d1 can be 0.5 mm, 0.51 mm, 0.6 mm, etc., and this application does not limit it. d1 being greater than 0.4 mm makes the first minimum distance D larger; d1 being less than 0.7 mm can take into account the area of ​​the display area AA and reduce the impact of the size of the minimum distance d1 on the light-emitting area of ​​the display area AA. That is, while taking into account the area of ​​the display area AA, the first minimum distance D is made larger, thereby making the overall incident angle α larger, so that the light originally leaking from the straight position moves to the inner side of the inner cover plate 12 and is absorbed by the light-shielding layer 11. Light rays with a larger incident angle α have a chance to exit from the upright position. However, since the incident angle α is greater than a certain angle, the light will undergo total internal reflection a second time in the arc transition area of ​​the cover plate 12 and will eventually be absorbed by the light-shielding layer 11. Due to the larger overall incident angle, a greater proportion of the light is absorbed during the second total internal reflection, which reduces the light leakage range on the side of the cover plate 12. Secondly, the light rays that are not absorbed by the light-shielding layer 11 have a larger average exit angle due to the larger overall incident angle α. Since the characteristic of the light emitted by the light-emitting functional unit 1021 is that the exit brightness decreases as the incident angle increases, it also reduces the light leakage intensity at the upright position of the cover plate 12.

[0063] In one feasible implementation, such as Figure 2 and Figure 3 As shown, the display module 1 also includes an outer frame 13, which is disposed around the display panel 10 and is spaced from the display panel 10 by a third minimum distance; the third minimum distance is greater than 0.2mm. Specifically, the third minimum distance can be 0.21mm, 0.25mm, 0.3mm, 0.5mm, etc., and this application does not limit it.

[0064] In the above embodiments, keeping the third minimum distance between the outer frame 13 and the display panel 10 unchanged can reduce the possibility of interference between the outer frame 13 and the display panel 10.

[0065] In one feasible implementation, such as Figure 4 As shown, the display module 1 also includes a touch adhesive layer 18, a touch sensing layer 14, a transparent adhesive layer 15, a polarizing layer 16, and a cover plate 12 adhesive layer, which are sequentially arranged between the display panel 10 and the cover plate 12 and in a direction away from the display panel 10. The touch sensing layer 14 enables the touch function of the display module 1. The touch adhesive layer 18 can be provided between the touch sensing layer 14 and the display panel 10. On the one hand, it can improve the fixing strength between the touch sensing layer 14 and the display panel 10 to improve reliability. On the other hand, it can make the size of the second minimum distance H larger, thereby increasing the angle between the light emitted by the light-emitting functional layer and the plane where the substrate 101 is located, so that a larger range of light angles can be absorbed by the light-shielding layer 11. The angle between the light not absorbed by the light-shielding layer 11 and the plane where the substrate 101 is located is larger, so that the incident angle α of the light on the cover plate 12 is less than the critical angle, thereby avoiding total internal reflection. The light leakage source of the straight body position S on the side of the cover plate 12 is mainly total internal reflection. Therefore, by setting a suitable second minimum distance H, total internal reflection can be avoided, thereby improving or eliminating this type of light leakage.

[0066] In the above embodiment, the thickness of the touch bonding adhesive layer 18 is greater than or equal to 0.1 mm and less than or equal to 0.15 mm, which makes the size of the second minimum distance H larger, thereby improving the light leakage prevention effect and taking into account the overall thickness of the display module 1.

[0067] In the above embodiment, the total thickness of the transparent adhesive layer 15 and the polarizing layer 16 along the first direction is greater than 0.15 mm and less than or equal to 0.17 mm. By setting the total thickness of the transparent adhesive layer 15 and the polarizing layer 16 along the first direction within the above range, the size of the second minimum distance H is increased, thereby improving the light leakage prevention effect while taking into account the overall thickness of the display module 1.

[0068] In the above embodiment, the thickness of the adhesive layer of the cover plate 12 along the first direction is greater than 0.15 mm and less than or equal to 0.25 mm. By setting the thickness of the adhesive layer of the cover plate 12 along the first direction within the above range, the second minimum distance value is improved, thereby enhancing the light leakage prevention effect while taking into account the overall thickness of the display module 1.

[0069] Please see Figure 1 and Figure 2 This application also provides a method for determining the parameters of a display module 1. The display module 1 includes a display panel 10, a light-shielding layer 11, and a cover plate 12 arranged sequentially along a first direction. The display module 1 also includes a display area AA and a non-display area NA that at least partially surrounds the display area AA. The light-shielding layer 11 is located in the non-display area NA. The light-emitting layer 102 includes a light-emitting functional part 1021 located in the display area AA. Along a direction parallel to the substrate 101, the minimum distance between the light-emitting functional part 1021 and the light-shielding layer 11 is a first minimum distance D. Along a direction perpendicular to the substrate 101, the minimum distance between the surface of the light-emitting functional part 1021 facing away from the substrate 101 and the surface of the light-shielding layer 11 near the substrate 101 is a second minimum distance H. The first direction can be the thickness direction of the display module 1. Specifically, the direction perpendicular to the substrate 101 can also be the thickness direction of the display module 1.

[0070] The light-emitting functional unit 1021 is the portion of the light-emitting layer 102 located in the display area AA. The light-emitting functional unit 1021 emits light to realize the display of the display panel 10.

[0071] Parameter determination methods include:

[0072] Adjust at least one of the first minimum distance D and the second minimum distance H so that the light emitted by the light-emitting functional part 1021 is emitted from the light-emitting surface of the cover plate 12 or absorbed by the light-shielding layer 11 after being reflected by the cover plate 12.

[0073] Specifically, such as Figure 2 As shown, the light-emitting surface of the cover plate 12 refers to the portion of the outer surface of the cover plate 12 away from the display panel 10, excluding the straight section S of the cover plate 12. The cover plate 12 is typically designed with rounded edges for safety, aesthetics, and touch functionality, while the area on the side excluding the rounded transition area is the straight section S perpendicular to the display plane of the cover plate.

[0074] In the parameter determination method of the display panel 10 provided in this application, by adjusting the first minimum distance D between the light-emitting functional part 1021 of the light-emitting layer 102 located in the display area AA and the light-shielding layer 11 in the direction parallel to the substrate 101, the light leaking from the cover plate 12 at its original upright position S moves towards the inner side of the inner cover plate, that is, towards the display area AA, and is thus absorbed by the light-shielding layer 11. Light at a larger angle may be emitted at the upright position S, but light at a larger angle is prone to secondary total internal reflection in the arc transition area of ​​the cover plate, and is ultimately absorbed by the light-shielding layer 11. After the first minimum distance D is increased, the overall incident angle (the angle α between the light emitted by the light-emitting functional layer 1021 and the direction perpendicular to the display plane) becomes larger, and a larger proportion of secondary total internal reflection is absorbed, which reduces the light leakage range on the side of the cover plate. Secondly, the light not absorbed by the light-shielding layer 11 has a larger average exit angle than before adjustment. Since the characteristic of the light-emitting functional unit 1021 is that the emitted brightness decreases as the incident angle increases, it also reduces the light leakage intensity on the side of the cover plate. And / or, by adjusting the second minimum distance H along the thickness direction of the substrate 101 between the surface of the light-emitting functional unit 1021 away from the substrate 101 and the surface of the light-shielding layer 11 near the substrate 101, the angle between the light emitted by the light-emitting functional unit 1021 and the plane of the substrate can be increased. This causes the light leaking from the original upright position S of the cover plate 12 to move towards the inner side of the cover plate, that is, towards the direction closer to the display area AA, so that a larger range of light angles is absorbed by the light-shielding layer. The angle between the light not absorbed by the light-shielding layer 11 and the plane of the substrate is larger, so that the incident angle of the light hitting the cover plate is less than the critical angle, thus avoiding total internal reflection. Since the light leakage from the upright position S of the cover plate is mainly due to total internal reflection, adjusting the second minimum distance can avoid total internal reflection, thereby improving or eliminating this type of light leakage. In the parameter determination method provided in this application, the relative positional relationship between the light-shielding layer 11 and the light-emitting functional unit 1021 is adjusted by adjusting the first minimum distance D and / or the second minimum distance H. This allows the light-shielding layer 11 to better block the large-angle light emitted by the light-emitting functional unit 1021, and ensures that the light not blocked by the light-shielding layer 11 is emitted from the light-emitting surface of the cover plate 12, or reflected by the cover plate 12 and absorbed by the light-shielding layer 11. This reduces the probability of the light emitted by the light-emitting functional unit 1021 escaping through the direct position S of the cover plate 12, thereby improving the light leakage phenomenon at the edge of the display module 1.

[0075] The aforementioned display module 1 may also include a buffer support layer 19, which is located on the side of the display panel 10 away from the cover plate 12 and is used to provide buffering and support for the display panel 10.

[0076] In one feasible implementation, the step of adjusting at least one of the first minimum distance D and the second minimum distance H so that the light emitted by the light-emitting functional unit 1021 is emitted from the light-emitting surface of the display panel 10 or absorbed by the light-shielding layer 11 after being reflected by the cover plate 12 includes:

[0077] Adjust the first minimum distance D to make the first minimum distance D greater than a first preset value; or,

[0078] Adjust the second minimum distance H to make the second minimum distance H greater than the second preset value.

[0079] In the above embodiment, the first minimum distance D is adjusted to be greater than a first preset value, so that the small-angle light emitted by the light-emitting functional unit 1021 can be directly emitted from the light-emitting surface of the cover plate 12, and the incident angle α formed between the large-angle light emitted by the light-emitting functional unit 1021 and the cover plate 12 is increased. This incident angle α is greater than the critical angle for total internal reflection, so that the large-angle light emitted by the light-emitting functional unit 1021 is absorbed by the light-shielding layer 11 after total internal reflection within the cover plate 12, or the large-angle light emitted by the light-emitting functional unit 1021 is absorbed by the light-shielding layer 11 after multiple reflections within the cover plate 12. The light not absorbed by the light-shielding layer 11 will have an average emission angle greater than the average emission angle before the first minimum distance D is increased. Since the characteristic of the light-emitting functional unit 1021 is that the brightness of the emitted light decreases as the emission angle increases, increasing the first minimum distance D can improve the edge light leakage intensity of the display module 1, thus improving the edge light leakage of the display module 1.

[0080] Specifically, when the first minimum distance D is greater than the first preset value, the light that originally leaked out from the upright position moves to the inside of the cover plate 12 and is absorbed by the light-shielding layer 11.

[0081] Specifically, when the incident angle is greater than the preset angle, the light undergoes secondary total internal reflection in the arc transition area of ​​the cover plate 12 and is ultimately absorbed by the light-shielding layer 11. Because the overall incident angle is larger, a greater proportion of the light is absorbed during secondary total internal reflection, thus reducing the light leakage range on the side of the cover plate 12. Secondly, the light not absorbed by the light-shielding layer 11, since its average exit angle is still greater than the previous adjustment, and the characteristic of the light-emitting unit 1021 is that its exit brightness decreases as the incident angle increases, also reduces the light leakage intensity at the vertical position of the cover plate 12.

[0082] In the above embodiment, adjusting the second minimum distance H to be greater than the second preset value increases the distance between the light-emitting functional part 1021 and the light-shielding layer 11 along the thickness direction of the substrate 101. When the second minimum distance H is greater than the second preset value, the angle between the light emitted by the light-emitting functional part 1021 and the plane of the substrate is increased. The light originally leaking from the straight side moves towards the inside of the cover plate 12 and is absorbed by the light-shielding layer 11, thus blocking a larger range of light angles. The incident angle α of the unblocked light is less than the critical angle, thus not satisfying the total internal reflection condition, and total internal reflection can be avoided. The light leakage from the straight side S of the cover plate 12 is mainly due to total internal reflection; therefore, adjusting the second minimum distance H to be greater than the second preset value can improve or eliminate the light leakage from the straight side S of the cover plate 12.

[0083] In the above embodiments, the first preset value is 0.2 mm; the second preset value is 1.15 mm.

[0084] Specifically, D can be 0.21mm, 0.22mm, 0.25mm, 0.3mm, etc., and this application does not impose any special limitations. H can be 1.152mm, 1.155mm, 1.159mm, 1.160mm, etc., and this application does not impose any special limitations.

[0085] In one feasible embodiment, the light-emitting functional unit 1021 includes a first electrode layer and a light-emitting material layer stacked along a direction away from the substrate 101, and the display panel 10 further includes an encapsulation unit 103, such as... Figure 2 As shown, the encapsulation portion 103 is located on the side of the first electrode layer away from the substrate 101 and is on the same layer as the light-emitting material layer. The encapsulation portion 103 is located on the side of the light-emitting material layer near the non-display area NA, and the encapsulation portion 103 is in contact with the edge of the light-emitting material layer near the non-display area NA. In this embodiment, the encapsulation portion 103 is used to encapsulate the light-emitting functional portion 1021 inside the substrate 101 and the cover plate 12.

[0086] like Figure 2 As shown, the minimum distance between the edge of the encapsulation part 103 near the display area AA and the edge of the encapsulation part 103 away from the display area AA along the direction from the display area AA to the non-display area NA is the first distance d1.

[0087] The steps of adjusting the first minimum distance D to make the first minimum distance D less than the first preset value include:

[0088] Increase the first distance d1.

[0089] In the above embodiment, the value of the first minimum distance D is increased by increasing the first distance d1 of the encapsulation part 103. This adjustment method is simple, easy to manufacture, and can further improve the encapsulation effect of the encapsulation part 103. At the same time, this adjustment method has a long-lasting effect, does not affect the product's appearance, and does not damage the product's reliability. Specifically, the severity of light leakage on the side of the cover plate 12 is related to the material and shape of the cover plate 12, which usually depends on the user's requirements for product performance and appearance. This solution can improve the light leakage on the side of the cover plate 12 by optimizing the design of the dimensions of the encapsulation part 103, while maintaining the structure and shape of the display module 1, without affecting the compatibility of the terminal assembly, and is not limited by the material and shape of the cover plate 12. In addition, since no additional processes are required, it helps to save costs.

[0090] In one feasible implementation, 0.4mm <d1<0.7mm。

[0091] In the above embodiments, d1 can be 0.42mm, 0.45mm, 0.47mm, 0.50mm, 0.56mm, 0.60mm, 0.63mm, etc., and this application does not impose any particular limitation.

[0092] In the above embodiments, the width d1 of the encapsulation part 103 can be selected according to the actual product requirements to minimize the impact on the area of ​​the display area AA.

[0093] In one feasible implementation, such as Figure 2 and Figure 3 As shown, the display module 1 also includes an outer frame 13, which is disposed on the periphery of the display panel 10 and is spaced by a third minimum distance from the display panel 10; the minimum distance between the outer frame 13 on the side closer to the display area AA and the side farther away from the display area AA along the direction from the display area AA to the non-display area NA is the second distance d2.

[0094] The steps of adjusting the first minimum distance D to make the first minimum distance D less than the first preset value include:

[0095] Keeping the third minimum distance and the size of the light-shielding layer 11 unchanged, increase the second distance d2.

[0096] In the above-described embodiment, keeping the distance between the outer frame 13 and the display panel 10 unchanged at the third minimum distance can reduce the possibility of interference between the outer frame 13 and the display panel 10. The projection of the light-shielding layer 11 in the first direction overlaps with the outer frame 13, at the position where the third minimum distance is provided between the outer frame 13 and the display panel, and the projection of the display panel in the first direction. Without changing the third minimum distance and the size of the light-shielding layer 11, increasing the second distance d2 can make the minimum dimension of the part of the light-shielding layer 11 on the outer frame 13 along the direction parallel to the substrate increase, so that the overlapping area of the positive projections of the light-shielding layer 11 and the display panel in the first direction decreases, and thus the light-shielding layer 11 moves away from the display area AA, causing the first minimum distance D to increase.

[0097] Preferably, the third minimum distance is greater than 0.2 mm. Specifically, it can be 0.3 mm, 0.4 mm, 0.45 mm, etc., and the present application does not make specific limitations thereto.

[0098] In the above-described embodiment, the outer frame 13 is adhesively fixed to the cover plate 12 through the adhesive layer 20.

[0099] In a feasible embodiment, as Figure 2 and Figure 3 shown, the display module 1 further includes a transparent adhesive layer 15, a polarizing layer 16, and a cover plate bonding adhesive layer 17 that are disposed between the display panel 10 and the cover plate 12 and are stacked in a direction away from the display panel;

[0100] The step of adjusting the second minimum distance H to make the second minimum distance H greater than the second preset value includes:

[0101] The total thickness of the transparent adhesive layer 15 and the polarizing layer 16 is the third distance d3, and the third distance d3 is adjusted such that 0.15 mm < d3 ≤ 0.17 mm; and / or,

[0102] The thickness of the cover plate bonding adhesive layer 17 is the fourth distance d4, and the fourth distance d4 is adjusted such that 0.15 mm < d4 ≤ 0.25 mm. Specifically, the third distance d3 can be 0.151 mm, 0.155 mm, 0.16 mm, 0.166 mm, etc. The fourth distance d4 can be 0.151 mm, 0.18 mm, 0.2 mm, 0.22 mm, etc.

[0103] In the above-described embodiment, the second minimum distance H can be made greater than the second preset value by adjusting at least one of the total thickness of the transparent adhesive layer 15 and the polarizing layer 16 and the thickness of the cover plate bonding adhesive layer 17.

[0104] In the above embodiment, when the second minimum distance H is greater than the second preset value, a portion of the light rays in a large angle range are blocked by the light-shielding layer 11, and the angle between the unblocked light rays and the direction parallel to the substrate 101 increases, i.e., the incident angle α decreases, thus failing to meet the total internal reflection condition. Since the light leakage at the side of the cover plate 12 at the vertical position S is mainly due to total internal reflection, setting a suitable second minimum distance H can avoid total internal reflection, thereby improving or eliminating this type of light leakage. This embodiment, when the display module 1 has sufficient space along its thickness direction, can achieve a better effect in improving lateral light leakage from the cover plate 12.

[0105] Furthermore, the display panel 10 also includes an encapsulation layer 104 located on the side of the light-emitting layer 102 facing away from the substrate 101.

[0106] In one feasible implementation, such as Figure 2 As shown, the second minimum distance H can be made greater than the second preset value by adjusting the thickness of the encapsulation layer 104. Specifically, this includes adjusting the thickness d6 of the encapsulation layer 104 along the first direction to 0.3mm. <d6≤0.5mm。

[0107] In one feasible implementation, such as Figure 4 As shown, the display module 1 also includes a touch sensing layer 14 located between the display panel 10 and the transparent adhesive layer 15. The step of adjusting the second minimum distance H to make the second minimum distance H greater than the second preset value includes:

[0108] A touch-adhesive layer 18 is provided between the display panel 10 and the touch-sensing layer 14.

[0109] In the above embodiments, a touch adhesive layer 18 is added between the display panel 10 and the touch sensing layer 14 to ensure that the second minimum distance H is greater than a second preset value. This embodiment can improve the fixing strength between the display panel 10 and the touch sensing layer 14, and at the same time improve the light leakage phenomenon at the side of the display module 1. This embodiment is easy to operate, has a long-lasting effect, and will not adversely affect the reliability of the product.

[0110] In one feasible implementation, such as Figure 4 As shown, the thickness of the touch adhesive layer 18 along the first direction is the fifth distance d5. The fifth distance d5 is adjusted so that 0.1mm≤d5≤0.15mm.

[0111] Specifically, d5 can be 0.1mm, 0.11mm, 0.12mm, 0.15mm, etc., and this application does not impose any special limitations.

[0112] In the above embodiments, by setting the thickness of the touch bonding adhesive layer 18 along the first direction within the above-mentioned range, both the bonding effect and the thickness of the display module can be taken into account, and the light leakage phenomenon at the side straight position S of the display module 1 can be improved.

[0113] This application also provides a display device, including any of the display modules 1 provided in the above embodiments of this application.

[0114] Since the display device provided in this application includes any of the display modules 1 provided in the above embodiments, the display device provided in this application has the beneficial effects of any of the display modules 1 provided in the above embodiments, which will not be repeated here.

[0115] The display devices in this application include, but are not limited to, mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, control consoles, and other devices with display functions.

[0116] The embodiments described above are not exhaustive and do not limit the invention to specific examples. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of this application, thereby enabling those skilled in the art to effectively utilize this application and its modifications. This application is limited only by the claims and their full scope and equivalents.

Claims

1. A display module, characterized by The display module includes a display area and a non-display area at least partially surrounding the display area, and the display module further includes: The display panel includes a substrate and a light-emitting layer formed on the substrate, the light-emitting layer including a light-emitting functional portion located in the display area; A light-shielding layer is located on the light-emitting side of the display panel, and the light-shielding layer is located in the non-display area; The cover plate is located on the side of the light-shielding layer opposite to the display panel; Wherein, the minimum distance between the light-emitting functional part and the light-shielding layer along the direction parallel to the substrate is the first minimum distance; the minimum distance between the surface of the light-emitting functional part away from the substrate and the surface of the light-shielding layer close to the substrate along the direction perpendicular to the substrate is the second minimum distance; By setting the first minimum distance, the incident angle α of light incident on the cover plate is increased, increasing the proportion of light that undergoes secondary total internal reflection and is absorbed by the light-shielding layer in the arc transition area of ​​the cover plate, and reducing the light leakage intensity of the display module; or, by setting the second minimum distance, the angle between the light emitted by the light-emitting functional part and the plane where the substrate is located is increased, reducing the incident angle α of light incident on the cover plate, thereby reducing the probability of total internal reflection or avoiding total internal reflection.

2. The display module of claim 1, wherein, The first minimum distance is greater than 0.2 mm.

3. The display module of claim 1, wherein, The second minimum distance is greater than 1.15 mm.

4. The display module of claim 2, wherein, The light-emitting functional part includes a first electrode layer and a light-emitting material layer stacked along the direction away from the substrate. The display panel also includes an encapsulation part, which is located on the side of the first electrode layer away from the substrate and is on the same layer as the light-emitting material layer. The encapsulation part is located on the side of the light-emitting material layer near the non-display area, and the encapsulation part is in contact with the edge of the light-emitting material layer near the non-display area. Along the direction from the display area to the non-display area, the minimum distance between the edge of the encapsulation portion closer to the display area and the edge of the encapsulation portion farther from the display area is greater than 0.4 mm and less than 0.7 mm.

5. The display module of claim 1, wherein, The display module further includes an outer frame, which is disposed around the periphery of the display panel and is spaced apart from the display panel by a third minimum distance; the third minimum distance is greater than 0.2mm.

6. The display module of claim 1, wherein, The display module further includes a touch bonding adhesive layer, a touch sensing layer, a transparent adhesive layer, a polarizing layer, and a cover adhesive layer, which are arranged sequentially between the display panel and the cover plate and in a direction away from the display panel.

7. The display module of claim 6, wherein, The thickness of the touch-sensitive adhesive layer is greater than or equal to 0.1 mm and less than or equal to 0.15 mm.

8. The display module of claim 6, wherein, The total thickness of the transparent adhesive layer and the polarizing layer along the first direction is greater than 0.15 mm and less than or equal to 0.17 mm.

9. The display module of claim 6, wherein, The thickness of the cover plate adhesive layer along the first direction is greater than 0.15 mm and less than or equal to 0.25 mm.

10. A method for determining parameters of a display module, characterized in that, The display module includes a display panel, a light-shielding layer, and a cover plate arranged sequentially along a first direction. The display panel includes a substrate and a light-emitting layer formed on the substrate. The display module also includes a display area and a non-display area that at least partially surrounds the display area. The light-shielding layer is located in the non-display area, and the light-emitting layer includes a light-emitting functional part located in the display area. Along a direction parallel to the substrate, the minimum distance between the light-emitting functional part and the light-shielding layer is the first minimum distance; Along a direction perpendicular to the substrate, the minimum distance between the surface of the light-emitting functional part facing away from the substrate and the surface of the light-shielding layer close to the substrate is the second minimum distance; The parameter determination method includes: The first minimum distance is set to increase the incident angle α of light incident on the cover plate, increase the proportion of light that undergoes secondary total internal reflection in the arc transition area of ​​the cover plate and is absorbed by the light-shielding layer, and reduce the light leakage intensity of the display module; or, the second minimum distance is set to increase the angle between the light emitted by the light-emitting functional part and the plane where the substrate is located, decrease the incident angle α of light incident on the cover plate, so as to reduce the probability of total internal reflection or avoid total internal reflection.

11. The method of claim 10, wherein The steps of setting the first minimum distance to increase the incident angle α of light on the cover plate, increasing the proportion of light being absorbed by the light-shielding layer during secondary total internal reflection in the arc transition area of ​​the cover plate, and reducing the light leakage intensity of the display module; or setting the second minimum distance to increase the angle between the light emitted by the light-emitting functional part and the plane where the substrate is located, and decreasing the incident angle α of light on the cover plate, thereby reducing the probability of total internal reflection or avoiding total internal reflection, include: Adjust the first minimum distance to make it greater than a first preset value; or, Adjust the second minimum distance to make the second minimum distance greater than the second preset value.

12. The method of claim 11, wherein The first preset value is 0.2mm; the second preset value is 1.15mm.

13. The method of claim 11, wherein The light-emitting functional part includes a first electrode layer and a light-emitting material layer stacked along the direction away from the substrate. The display panel also includes an encapsulation part, which is located on the side of the first electrode layer away from the substrate and is on the same layer as the light-emitting material layer. The encapsulation part is located on the side of the light-emitting material layer near the non-display area, and the encapsulation part is in contact with the edge of the light-emitting material layer near the non-display area. The minimum distance between the edge of the encapsulation portion near the display area and the edge of the encapsulation portion away from the display area along the direction from the display area is the first distance d1; The step of adjusting the first minimum distance to make the first minimum distance greater than the first preset value includes: Increase the first distance d1.

14. The method of claim 13, wherein 0.4mm <d1<0.7mm。 15. The method of claim 11, wherein: The display module further includes an outer frame, which is disposed on the periphery of the display panel and has a third minimum distance from the display panel; along the direction from the display area to the non-display area, the minimum distance between the edge of the outer frame close to the display area and the edge of the outer frame away from the display area is the second distance d2; The step of adjusting the first minimum distance so that the first minimum distance is greater than a first preset value includes: Keeping the third minimum distance and the size of the light-shielding layer unchanged and increasing the second distance d2.

16. The method of claim 15, wherein The third minimum distance is greater than 0.2 mm.

17. The method of claim 11, wherein The display module further includes a transparent adhesive layer, a polarizer layer, and a cover plate bonding layer that are disposed between the display panel and the cover plate and are sequentially disposed in a direction away from the display panel; The step of adjusting the second minimum distance so that the second minimum distance is greater than a second preset value includes: The total thickness of the transparent adhesive layer and the polarizer layer in the first direction is the third distance d3, and the third distance d3 is adjusted so that 0.15 mm < d3 ≤ 0.17 mm; and / or, The thickness of the cover plate bonding layer in the first direction is the fourth distance d4, and the fourth distance d4 is adjusted so that 0.15 mm < d4 ≤ 0.25 mm; and / or, The display module further includes a touch sensing layer located between the display panel and the transparent adhesive layer. The step of adjusting the size of the second minimum distance so that the second minimum distance is greater than a second preset value includes: Providing a touch bonding layer between the display panel and the touch sensing layer.

18. The method of claim 17, wherein The thickness of the touch bonding layer in the first direction is the fifth distance d5, and the fifth distance d5 is adjusted so that 0.1 mm ≤ d5 ≤ 0.15 mm.

19. A display device comprising: Including the display module according to any one of claims 1-9.

Images